GSK180 (GSK-180) is a potent and specific inhibitor of kynurenine-3-monooxygenase (KMO) with IC50 of 6 nM, shows negligible activity against other enzymes on the tryptophan pathway; inhibits the convertion of kynurenine to 3-hydroxykynurenine with IC50 of 2.0 uM in cell-based assays; prevents multiple organ failure in rodent models of acute pancreatitis.